<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
             <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
            <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import * as echarts from "echarts"
import _ from "lodash"
export default {
    data(){
        return {
            // 需要合并的数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
                }
    },
    created(){

    },
    // 此时页面上的元素已经渲染完毕
    async mounted(){
        // 3.基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const {data: res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200){
            return this.$message.error("获取折线图失败")
        }

        // 4.指定图表的配置项和数据
        // var option = {
        //     title: {
        //         text: 'ECharts 入门示例'
        //     },
        //     tooltip: {},
        //     legend: {
        //         data:['销量']
        //     },
        //     xAxis: {
        //         data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
        //     },
        //     yAxis: {},
        //     series: [{
        //         name: '销量',
        //         type: 'bar',
        //         data: [5, 20, 36, 10, 10, 20]
        //     }]
        // };
        const result = _.merge(res.data, this.options)
        // 5.使用刚指定的配置项和数据显示图表。
        myChart.setOption(result);
    },
    methods: {

    }
}
</script>